import java.util.Scanner;

/**
 * Created with Intellij IDEA.
 * Description:
 * User:Lenovo
 * Date:2024-12-07
 * Time:10:09
 */
class Solution{
    public String tolowercase(String a){
        char[] arr = a.toCharArray();
        int count = arr.length;
        for (int i = 0; i < count; i++) {
            if(arr[i]<97){
                arr[i]=(char)(arr[i]+32);
            }
        }
       return new String(arr);
    }

}
public class Text {
    public static void main(String[] args) {
        Solution solution = new Solution();
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextLine()){
            String s = scanner.nextLine();
            System.out.println(solution.tolowercase(s));
        }
    }
}
